condition mean min max ZT0-3 1470.1 1470.1 1470.1 ZT4-7 1953.5 1953.5 1953.5 ZT8-11 1606.2 1606.2 1606.2 ZT12-15 1682.0500000000002 1682.0500000000002 1682.0500000000002 ZT16-19 1534.5 1534.5 1534.5 ZT20-23 1388.6 1388.6 1388.6